July 1st, 2018, 02:42 PM | #1 |
ninjette.org member
Name: Colin
Location: Toronto
Join Date: Aug 2017 Motorcycle(s): 2012 Ninja 250r Posts: 32
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Front brake hard braking question
I had to make an "emergency" stop today as a light decided to turn yellow on me and stopping seemed like the best decision. I braked hard, more and more weight going to the front, then something happened, it sounded like the brake pads skipping , not the tire locking. Wasnt a great sound and i eased off and rolled through the intersection as there was no traffic.
Would something like this happen if the pads / rotors were "glazed"? I am debating whether to bring to a local shop to inspect the brakes. Im just a bit worried how much they will want tp charge though. I know i should do it myself but not sure if i have the skills to tackle the brakes or not. 2012 bike has 4500 miles. I bought it last year with 2500 miles on it. Thanks!! |
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July 1st, 2018, 03:32 PM | #2 |
ninjette.org guru
Name: Pat
Location: SW VA
Join Date: Feb 2015 Motorcycle(s): 286, 296, 599, 799 Posts: 436
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Did the bars wiggle at all?
Did you get ABS back then in Canada? |
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July 1st, 2018, 03:42 PM | #3 |
ninjette.org member
Name: Colin
Location: Toronto
Join Date: Aug 2017 Motorcycle(s): 2012 Ninja 250r Posts: 32
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No abs but thats sorta what it felt like.
No wiggle either I have been noticing the last month a sort of vibration rubbing feeling/sound under heavy braking. This was the hardest i have ever braked. I think. |
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July 1st, 2018, 04:17 PM | #4 |
Guy Who Enjoys Riding
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I would inspect everything carefully for signs that the pads are worn out or damaged, look carefully at the disk and its mounting bolts, and anything else you can inspect. It's possible that new pads would fix it, but it's impossible to tell long-distance like this.
Nothing to do with your current problem, but when you get it straightened out, you need to go do some practicing of hard stops somewhere where there is no traffic. You don't want to learn how the motorcycle behaves while you're trying to stay alive, you need to already know. |
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July 1st, 2018, 04:19 PM | #5 | |
ninjette.org certified postwhore
Name: Bill
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Quote:
If your pads and disc were "glazed" they most likely would just squeal when braking. Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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July 1st, 2018, 04:23 PM | #6 |
ninjette.org guru
Name: Pat
Location: SW VA
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Our rotor can also develop a dish or plate shape to it. You can try to watch it run thru the pad and see if it’s at a slight angle. You may have to pull the rotor off the wheel and put it on a flat surface to see if it’s dished.
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July 1st, 2018, 07:22 PM | #7 |
ninjette.org member
Name: Colin
Location: Toronto
Join Date: Aug 2017 Motorcycle(s): 2012 Ninja 250r Posts: 32
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Thx for the replies
This is my first bike and i get obsessed over things big and small... but anyways, i just went out and did some practice, emerg braking from about 80km, things seemed pretty decent. I locked up the front very briefly a couple times and you sure can hear it when that happens. Maybe that is what happened earlier not sure. Either way will monitor it some more. |
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July 1st, 2018, 08:04 PM | #8 |
Guy Who Enjoys Riding
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It could be that what you felt was lockup. I'm glad you did some practicing. I've been riding since the '70s, and I still practice fast stops once in a while, especially if I get a new motorcycle.
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July 2nd, 2018, 06:32 AM | #9 |
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Check your steering stem.
Grab the front brake and hold it firmly while you push and pull on the bars aggressively. Listen for a clicking or clunking from the steering stem area. The collar below the top triple can become loose, and allow for too much give between the stem and the frame. One of our Ninjas had some issues of that type, and we replaced the bearings with tapered roller bearings, which cured the problem. More info - https://faq.ninja250.org/wiki/Steeri...ng_replacement |
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July 2nd, 2018, 08:33 AM | #10 |
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I would give everything on the front end of the bike a very thorough looksee. So, check out the head bearings, handlebars, master cylinder, forks, triples, caliper, brake hose, rotor, etc. All of it. Make sure nothing is worn, leaking, loose, oxidized, etc etc.
Once all of that is satisfactory to you (remember you're the one that has to ride this thing, so you're the important one), I'd take it to a big empty parking lot and *cautiously* do some braking drills to attempt to recreate the condition or otherwise revalidate the braking system to yourself. Start easy and gradually work your way into harder braking and recreate the conditions (speed and aggressiveness of braking) that gave you that feeling in the first place. Be careful. Be diligent. Start small and work big. If you're able to recreate the condition, it can be diagnosed and fixed. If you're not able to recreate the condition, you will have proven the braking system to yourself, inspected the whole thing for roadworthiness, and given yourself some good practice time on braking skills. Win win situation. |
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July 2nd, 2018, 10:00 AM | #11 |
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Also check wheel-bearings.
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July 2nd, 2018, 02:06 PM | #12 | |
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Quote:
As far as hard bits go, there are some great posts here for things to check and even some mentions of "the problem is the rider." Never take that as an insult, 90%+ of the time riders cause their own issues. Take it with a smile and a willingness to learn. As did some of the posters in this very there that I trained to break super hard to the very edge. And one... past it that now has some rubber on his leathers. I have a question though.......... You had an "emergency braking" situation, but then rolled through an intersection with no cars? What happened?!?!?!? Animal? UFO's? Bigfoot? Sorry, I am missing something. ps.... After you get the basics of braking down. AND I do mean REALLY DOWN then try reading this thread. https://www.ninjette.org/forums/showthread.php?t=196883 Best of luck to you sir and never be afraid to question things.
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July 2nd, 2018, 02:24 PM | #13 |
ninjette.org member
Name: Colin
Location: Toronto
Join Date: Aug 2017 Motorcycle(s): 2012 Ninja 250r Posts: 32
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Thx again all!
I rolled through the intersection because the sound totally freaked me out and i decided to stop braking so hard at that point. But again i knew it was safe to do so. I have been practicing a lot of braking the past 24 hrs. Im still considering taking it in and asking them to check the front end thoroughly. I really dont know what im looking at there. But my hard braking routines seemed to go well. Would it be a mistake to bring it to a shop? And no im never insulted... i am a noob! But wanting to learn. I picked up the bike late aug 2017 and 1 hour later i low sided slammed hard down on my shoulder and broke left collarbone. Clean break. So basically i started riding in april 2018. Im pretty confident on the little ninja now but im itching to do a track day. Also im taking the total control advanced rider level 1 this month should be fun. Then the question becomes do i get a new bike next year and sell the 250. Honestly id like to keep it. Sigh who knows.... so many decisions. And so little money hahaha. Anyways thx for all the suggestions. Much appreciated! |
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July 2nd, 2018, 05:52 PM | #14 | |
Guy Who Enjoys Riding
Name: Jim
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Excellent! Many seasoned riders never do that, but it's a very important thing to do.
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You'll love it on the track, too. |
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July 2nd, 2018, 06:08 PM | #15 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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July 2nd, 2018, 06:23 PM | #16 |
Guy Who Enjoys Riding
Name: Jim
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Well, I can't say my 250 is my last one, but I don't plan to part with it.
(your 250 is seven feet long?) |
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July 2nd, 2018, 07:29 PM | #17 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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